
The Fibonacci word \({\bf f} = 0100101001001010010100100 \cdots \) ,
fixed point of the morphism \(0 \rightarrow 01\) , \(1 \rightarrow 0\) .
See, for example, [1]}.

The word \({\bf p} = 0121021010210121010210121 \cdots \) ,
fixed point of the morphism \(0 \rightarrow 01\) , \(1 \rightarrow 21\) , \(2 \rightarrow 0\) . This is sequence A287072 in the OEIS.
Its properties were recently studied in [2]}.

